Shrinksafe script fixed to workaround Linux vs BSD stat packages.
Under MacOSX (BSD) the format for stat needs "-f" switch, while
under Linux stat needs "-c". Changed to use ls and awk, which
seem to be cross compatible.
# use glob syntax.
syntax: glob
*.pyc
*.zip
*~
.project
.pydevproject
app.yaml
build
tests/coverageResults
*,cover
tests/.coverage
*.git
*.egg-info
eggs
parts
.installed.cfg
bin
develop-eggs
.gitignore
.DS_Store
.settings